Analog Devices Inc. LT8410IDC-1#TRMPBF

Overview

LT8410IDC-1#TRMPBF from Analog Devices (formerly Linear Technology) is an ultralow-power boost converter IC with integrated NPN switch, Schottky diode, and PMOS output disconnect circuitry. It operates from 2.5V to 16V input, delivers up to 40V output, features 8.5μA quiescent current in active mode, 0μA in shutdown, and an 8mA switch current limit - optimized for sensor power, RF MEMS relay bias, and low-current general-purpose biasing.

For engineers reviewing the LT8410IDC-1#TRMPBF datasheet, LT8410IDC-1#TRMPBF pinout, LT8410IDC-1#TRMPBF application, or LT8410IDC-1#TRMPBF equivalent, key selection criteria include its 8mA current-limited SW pin, integrated 12.4MΩ/0.4MΩ feedback divider, 1.235V reference voltage, shutdown-controlled output disconnect, and operation across –40°C to 125°C junction temperature.

Technical Context

The LT8410IDC-1#TRMPBF employs a variable peak inductor current and variable off-time control scheme to maintain high efficiency and low output ripple across wide load ranges. Its internal architecture includes a precision 1.235V bandgap reference, comparator-based SHDN pin with 60mV hysteresis, and soft-start via VREF pin capacitor discharge/charge.

It integrates a 25V-rated NPN switch (8mA current limit), Schottky diode (650–850mV forward drop at 10mA), and PMOS output disconnect (4mA current limit). The FBP pin sets regulated output voltage via VOUT = 31.85 × VFBP, with overvoltage clamping at 40V and built-in protection for CAP and VOUT pins.

Key Specifications

Pinout & Package

LT8410IDC-1#TRMPBF is housed in an 8-lead plastic DFN package (2mm × 2mm, 0.75mm height) with exposed thermal pad (Pin 9, GND). The package requires soldering of the exposed pad to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar boost converter applications.

Compared with LT8410IDC-1#TRMPBF, LT3464EDD#TRMPBF offers higher current but less integration and lower voltage capability, while LT1946AEDD#TRMPBF delivers high power at the cost of 375× higher quiescent current and no native output isolation - making LT8410IDC-1#TRMPBF uniquely suited for <10mA, <40V, sub-10μA IQ applications.

Availability

LT8410IDC-1#TRMPBF is available at Aetrix Electronics and suitable for sensor power, RF MEMS relay bias, and general-purpose low-power bias applications requiring stable component supply, extended temperature operation, and long-term lifecycle support.

Supply support for LT8410IDC-1#TRMPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.

The LT8410/LT8410-1 family was designed specifically for ultralow-power, high-voltage bias generation in space-constrained, battery-sensitive systems - emphasizing quiescent current optimization, integrated protection, and minimal external component count.

FAQ

What is the maximum output voltage supported by the LT8410IDC-1#TRMPBF?

The LT8410IDC-1#TRMPBF supports a maximum regulated output voltage of 40V, enforced by internal overvoltage protection circuitry on both the CAP and VOUT pins. Even if the FBP pin voltage is driven above the reference, the output will clamp at 40V to prevent damage to downstream components. This hard limit applies across the full –40°C to 125°C operating temperature range.

How does the LT8410IDC-1#TRMPBF achieve ultralow quiescent current?

The LT8410IDC-1#TRMPBF achieves 8.5μA quiescent current in active mode through multiple design techniques: integrated high-value (12.4MΩ/0.4MΩ) feedback resistors minimize input-referred current, a low-power control scheme varies both peak inductor current and switch off-time, and internal circuit blocks are selectively powered down during light loads. In shutdown, it draws 0μA by fully disabling all bias currents and disconnecting internal references.

What is the function of the FBP pin on the LT8410IDC-1#TRMPBF?

The FBP (Feedback Positive) pin on the LT8410IDC-1#TRMPBF serves as the non-inverting input to the internal error amplifier and directly sets the regulated output voltage via the relationship VOUT = 31.85 × VFBP. It can be driven by a resistor divider from the VREF pin (1.235V) or an external reference. With only 1.3–30nA input bias current, FBP enables precise, low-drift output programming using standard 1% resistors without significant loading error.

Does the LT8410IDC-1#TRMPBF include output disconnect functionality, and how does it work?

Yes, the LT8410IDC-1#TRMPBF includes integrated PMOS output disconnect. When enabled (SHDN > 1.45V), the PMOS connects VOUT to CAP; when disabled (SHDN < 0.3V), it opens the path, isolating the output from the boost circuit. This prevents backfeed and allows VOUT to discharge to ground. The PMOS has a 4mA current limit, protecting against short-circuit faults during disconnect transitions.

What package type and thermal considerations apply to the LT8410IDC-1#TRMPBF?

The LT8410IDC-1#TRMPBF uses an 8-lead 2mm × 2mm plastic DFN package with exposed thermal pad (Pin 9, GND). For reliable operation, the exposed pad must be soldered to a PCB copper pour connected to system ground. Thermal resistance θJA is 88°C/W; derating is required above 85°C ambient unless additional copper area or airflow is provided. No heatsink is needed for ≤5mA continuous output current at 25°C ambient.